diff --git a/docs/superpowers/specs/2026-06-11-wide-angle-distortion-design.md b/docs/superpowers/specs/2026-06-11-wide-angle-distortion-design.md
index 50d361f..9511912 100644
--- a/docs/superpowers/specs/2026-06-11-wide-angle-distortion-design.md
+++ b/docs/superpowers/specs/2026-06-11-wide-angle-distortion-design.md
@@ -88,8 +88,16 @@ calibration independent of display/canvas size.
 
 ## Data flow
 
+> **Correction (found in live testing):** the warp bends a path only at its *vertices*. A
+> straight G0/G1 move is a 2-point segment, so warping just its endpoints draws a straight
+> chord and hides the curvature entirely (measured ~320px of bow on bed-spanning lines
+> collapsed to nothing). `projectSegments` therefore **subdivides each segment in work space
+> (~20mm steps) before warping**, so the rendered polyline follows the curve. Arcs were
+> already flattened to dense vertices and are unaffected.
+
 ```
 G-code (mm)
+  → subdivide segments to ~20mm in work space
   → applyAlignment (per-job rotate/translate, mm)
   → applyPolyWarp forward (mm → normalized image)
   → scale to canvas px → draw overlay